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Which two statements about the SQL Management Base （SMB） are true？（） 
A: It contains only SQL profiles generated by SQL Tuning Advisor.
B: It stores plans generated by the optimizer using a stored outline.
C: It is part of the data dictionary and stored in the SYSAUX tablespace.
D: It is part of the data dictionary and stored in the SYSTEM tablespace.
E: It contains the statement log，the plan history，plan baselines，and SQL profiles.

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出自：Oracle认证

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